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Stock-Based Compensation, Performance Units (Details) - Performance Unit Awards [Member] - $ / shares
3 Months Ended 9 Months Ended
Mar. 31, 2017
Sep. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Units granted (in shares) 33,883  
Weighted average grant date fair value (in dollars per share) $ 168.80  
Length of service after grant date   3 years
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Payout range 0.00%  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Payout range 200.00%